When I tell it to transfer from the device to the PC using MapSource, it brings in only a yellow box. When I tried the tutorial to convert the .img files, it appears to work, and the mapset shows up listed in MapSource, but it says it is locked. When I try to unlock it (I have the unlock code) it sends me online, and Garmin tries to unlock it on the GPS unit. I am baffled. I'm sure I'm doing something wrong. Can anyone tell me what that something is?